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mmc: dw_mmc: Add support for IMG Pistachio 

Add support for the DW MMC host found on the Imagination Pistachio SoC.
Like the DW MMC hosts found on SOCFPGA and Rockchip SoCs, the DW MMC
host on Pistachio requires the use of SDMMC_CMD_USE_HOLD_REG.

Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
Reviewed-by: Doug Anderson <dianders@chromium.org>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Andrew Bresticker 2014-11-13 10:50:21 -08:00 committed by Ulf Hansson
parent d13552908b
commit 4d7c07cd6c
2 changed files with 35 additions and 0 deletions
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29
Documentation/devicetree/bindings/mmc/img-dw-mshc.txt Normal file
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@ -0,0 +1,29 @@
* Imagination specific extensions to the Synopsys Designware Mobile Storage
Host Controller
The Synopsys designware mobile storage host controller is used to interface
a SoC with storage medium such as eMMC or SD/MMC cards. This file documents
differences between the core Synopsys dw mshc controller properties described
by synopsys-dw-mshc.txt and the properties used by the Imagination specific
extensions to the Synopsys Designware Mobile Storage Host Controller.
Required Properties:
* compatible: should be
- "img,pistachio-dw-mshc": for Pistachio SoCs
Example:
mmc@18142000 {
compatible = "img,pistachio-dw-mshc";
reg = <0x18142000 0x400>;
interrupts = <GIC_SHARED 39 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&system_clk>, <&sdhost_clk>;
clock-names = "biu", "ciu";
fifo-depth = <0x20>;
bus-width = <4>;
num-slots = <1>;
disable-wp;
};

6
drivers/mmc/host/dw_mmc-pltfm.c
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@ -35,6 +35,10 @@ static const struct dw_mci_drv_data socfpga_drv_data = {
.prepare_command = dw_mci_pltfm_prepare_command,
};
static const struct dw_mci_drv_data pistachio_drv_data = {
.prepare_command = dw_mci_pltfm_prepare_command,
};
int dw_mci_pltfm_register(struct platform_device *pdev,
const struct dw_mci_drv_data *drv_data)
{
@ -90,6 +94,8 @@ static const struct of_device_id dw_mci_pltfm_match[] = {
{ .compatible = "snps,dw-mshc", },
{ .compatible = "altr,socfpga-dw-mshc",
.data = &socfpga_drv_data },
{ .compatible = "img,pistachio-dw-mshc",
.data = &pistachio_drv_data },
{},
};
MODULE_DEVICE_TABLE(of, dw_mci_pltfm_match);